Water heater or steam boiler



A 1934- F w. OFELDT I WATER EEATER OR STEAM BOILER Original Filed Sept. 23, 1927 ll-v lla INVENTOR W-JWL I 44 M Patented Aug. 21, 1934 UNITED STATES PATENT oFFia Application September 23, 1927,'Seria1 No. 221,455 Renewed September 16, 1932 8 Claims.

The present invention relates broadly to the art of liquid heating, and more particularly as applicable to the production of hot water or steam for any desired purposes.

6 In the accompanying drawing there is shown, more or less diagrammatically, for purposes of illustration only, a preferred embodiment of the present invention, it being understood that the drawing does not define the limits thereof, as

10 changes in the construction and operation disclosed therein may be made without departing either from the spirit of the invention or the scope of my broader claims. In the drawing,

Fig. 1 is a diagrammatic view illustrating one 15 manner of carrying out the present invention;

and

Fig. 2 is a detailed sectional view, on an enlarged scale, through a portion of the apparatus.

The method performed by the apparatus de- 20 scribed and claimed herein'is described and claimed in my co-pending application, Serial No. 461,078, for Method and apparatus for distributing fluid.

In accordance with the present invention, there 5 may be provided a suitable, casing 2 of any desired construction having supported therein, in any preferred manner, a coil 3 for the fluid to be heated. Positioned in heat conducting relationship below the coil 3 is a burner 4, herein 3 illustrated as being of the liquid fuel type, al-

though the utility of the invention is not limited in this respect. Located about the burner 4 is a vaporizing coil 5 through which the fuel passes on its way to the burner.

Positioned in cooperative relation to the burner 4 is a pilot 6 effective at such times as the burner 4 is out of operation for maintaining a predetermined temperature condition within the coils 3.

Located at any convenient point exterior of the casing 2 is a pump '1 having a connection 8 with a reservoir 9 or other source of liquid which it is desired to heat. The discharge connection 9a. from the pump Heads to one end of the coil 3 for supplying the liquid thereto.

Mounted adjacent the pump 7 is a second pump 10 controlling the supply of fuel to the burner 4. This second pump has a supply connection 11 leading from a suitable source of fuel supply 12. The outlet connection 13 of the pump 10 communicates directly with one end of the vaporizing coil 5, the opposite end of which delivers to the burner 4,

The coil 3 is provided with an outlet connection 14 adapted to be controlled by a valve 15 for regulating the discharge of hot water or steam from the coil. Intersectingthe connection 14 is a superheating connection 16 provided with a control valve 17. This superheating connection. has

a portion or portions thereof disposed in heat receiving relation to the burners 4 and 6, the parts being so designed that at least a portion of the liquid passing through the superheating connection will be converted into steam. This steam is delivered from the superheating connection to an inlet port 18 in a valve casing 19. Mounted 5 within the valve casing is an oscillating valve 20 of the two-way type, having its position in either extreme determined by stops 21 in the casing cooperating with a projection 22 on the valve.

With the parts in the position illustrated m in detail in Fig. 2, steam passes through the port 23 in the valve 20 to the passag way 2% communicating with the interiorof anTactuat ing cylinder 25. Operatively mounted within this cylinder is a piston 26, the piston rod 2'? of which is connected to a cross-head 28 slidably mounted on an operating lever 29. The operating leverahas a pivotal mounting 30 on a bracket 31 carried by a suitable support 32. The piston r0dl33 of the pump 7 hasa similar pivotal connection 34 with a cross-head 35, and the piston rod 36 of the pump 10 has a pivotal connection 37 with a cross head 38.

The pumps 7 and 10 are originally so proportioned and designed that during the normal operation of the apparatus they will be effective for delivering the desired amounts of liquid and fuel, respectively, to the coil 3 and the burner 4, the proportion being such that the amount of fuel supplied will heat the liquid to the de= sired temperature. I

With steam supplied to the cylinder 25 below the piston 26, the piston will be moved upwardly against the action of a return spring 39, there by producing an intake stroke of the pistons 33 and 36, respectively. As the piston continues its upward movement, it is effective through a link 40 for rocking a crank arm e1 having a pivotal mounting 42 in the valve casing. At a predetermined time in the movement of'the lever 29, the crank arm '41 will have been moved to such a position relatively to the operating arm 43 on the valve 20, that the tension spring 44, operatively connected to the arms 41 and 43, will extend above a center line connecting the points of attachment of the opposite ends of the spring and passing through the axis of rotation of the valve 20. At this time the valve will be snapped to its dotted line position, as shown in Fig, 2, thereby placing the passage- MG iii an way it in communication with the exhaust por tion as. At this time the return spring 99,wiil be effective for producing a movement of the lever 29 in the opposite direction to produce an ejection stroke of the pumps 7 and 10.

As the lever 29 approaches a predetermined lower position, the spring 44 will produce an opposite movement of the valve 20, thereby again admitting steam to the lower end of the cylinder 45. This operation will continue so long as the pressure within the coil 3 is low enough to permit the return spring 39 to function against such pressure. When the pressure exceeds this predetermined setting, the return spring will be ineffective for producing a return movement of the lever and it will remain in its upper position. This will out both of the pumps out of operation, as will be apparent.

Should there be a failure of liquid supply to the pump 7, there will be a'corresponding failure of liquid to the superheating connection 16, so that steam for operating the prime mover will notbe available. In that case the lever 29 will cease to operate, which, in turn, will cut of! any further supply of fuel to the burner 4.

The lever 29 may be provided with any suitable form of handle, as shown, whereby the apparatus may be easily and quickly started.

From the foregoing it will be apparent that I have provided an apparatus entirely automatic in its operation and possessing safety features in that either undue pressure or failure of liquid supply will cause the parts to cease operation. This constitutes one of the advantages 1 of the present invention.

The construction is such that by the desired proportioning of the displacement areas of the pumps '7 and 10, the liquid flowing through the coil 3 may be heated to any desired temperature. This temperature may be such as to produce either hot water for cleaning purposes, or steam for any purposes desired. This constitutes a further advantage of .the present invention.

I claim:

1. In a water heater, a heating coil, 9. burner, pumps for supplying water and fuel to said coil and burner respectively, a spring for effecting the discharge stroke of said pumps, and a steam engine for simultaneously effecting the suction stroke of the pumps and stressing said spring.

2. In a water heater, a heating coil, a burner, pumps for supplying water and fuel to said coil and burner, respectively, a spring for effecting a complete discharge stroke of said pumps as long as the pressure in said coil is below a certain value, and a steam cylinder for simultaneously effecting a suction stroke of the pumps and stressing said spring.

8. In a water heater. a heating coil, a burner. pumps for supplying water and fuel to said coil and burner, respectively, a spring for actuating the pumps on their discharge stroke, and a steam cylinder independent of the energy consuming device supplied by the coil for actuating the pumps on the suction stroke and for simultaneously stressing said spring.

4. A hot water generator comprising a heating cell, a burner therefor, a pump for supplying water to the coil, 9. pump for supplying fuel to the burner, means for normally urging the pumps to discharge, and means responsive to the pressure on the fluid discharged from said coil for actuating said pumps in one direction only against said first-mentioned means.

5. A hot water heater comprising a coil, a burner for heating the coil, 0. pump for supplying water to the coil, a pump for supplying fuel to the burner, and common operating means for said pumps including means for urging them to discharge, and means responsive to the pressure on the fluid discharged from the coil for actuating the pumps in one direction onLv against said first-mentioned means.

8. A water heater having a heating coil and a burner, a pump for supplying water to the coil at a' predetermined rate, means for supplying fuelto the burner at a rate correlated with the rate of supplying water, and means for actuating the pump on its discharge stroke and the fuelsupplying means, said actuating means being of said pumps.

8. In a water heater, a heating coil, a burner, pumps for supplying water and fuel to said coil and burner respectively, and independent means each effective to operate said pumps in one direction only comprising a steam cylinder and a spring eflective to actuate the pumps through a partial discharge stroke, at least, the length of the stroke depending on the pressure in the coil opposing the supply of water thereto.

FRANK W. OFEIDT.

effective in opposition to and only to the extent 

